![]() ![]() ![]() You will need to refer to a periodic table for proton values.Atomic mass of all elements (along with the rounded off values) is mentioned in the chart below. ![]() In this notation, the atomic number is not included. Symbol-mass format for the above atom would be written as Cr-52. For an example of this notation, look to the chromium atom shown below:Īnother way to refer to a specific atom is to write the mass number of the atom after the name, separated by a hyphen. ![]() The "A" value is written as a superscript while the "Z" value is written as a subscript. Both the atomic number and mass are written to the left of the chemical symbol. The composition of any atom can be illustrated with a shorthand notation called A/Z format. ![]()
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